Reversing valve for furnaces



Oct. 13, 1925-- 1,557,146

N. F. EGLER REVERSING VALVE FOR FURNACES Filed March 20,1925 3 SheetsSheet 1 FIGJI INVENTOR Oct. 13, 1925 N. F. EGLER REVERSING VALVE FOR FURNACES Filed March 20 1925 YINVENTOR W Patented Oct. 13, 1925.

UNITED STATES 1,557,146 PATENT OFFICE.

NICHOLAS F. EGLER, OF CHICAGO, ILLINOIS, ASSIGNOR TO DUFF PATENTS GO-MFAN Y,

0F PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

REVERSING VALVE FOR FURNACES.

Application filed March 20, 1925. Serial No. 16,995.

flow of gases from the furnace or furnaces to. a stack may be controlled within a single hood or chamber and by a single valve.

Another object of my invention is to simplify and improve generally the structure and operation of devices of this general type.

One form which my invention may take is shown in the accompanying drawing wherein Fig. 1 is a view, partially in side elevation and partially in section, showing somewhat diagrammatically, apparatus embodying my invention; Fig. 2 is a plan View of the apparatus; Fig. 3 is a side elevational view of the structure of Fig. 2; Fig. 4 is a view similar to that of Fig. 3 but showing certain of the parts in section, and Fig. 5 is an end elevational view.

The apparatus comprises a furnace 6, only a portion of which is shown having gas inlet passages 7 and 8 controlled by valves 9 and 10, respectively, and leading to the furnace or furnaces. The valves 9 and 10 may be of any suitable type. Furnace flues 11 and 12 are provided for alternately conducting products of combustion to the stack or chimney flues 13. The flues 1112-13 extend through a casting 14 that is provided with water receptacles 15 for cooling a reversing valve 16. The valve 16 and the flues are covered by a hood 17 that may be of somewhat the usual form. The reversing valve 16 is movable from the position shown in full lines in Figs. 1 and 4 to that shown in dotted lines therein, by mechanism that will be hereinafter described.

Sheaves 18 are provided at each side of the hood 17 for guiding ropes 19 each of which is secured at one end to an eye member 19 and passes over sheaves 20 and 21 "and is provided with a counterweight 22 the valve is carried vmainly by the rollers 25 and the counterweights 22. p

The valve is operated by meansof a lever 27 secured to a rock shaft 27 and connected to pull chains 28. A pair of crank arms 29 are connected to the rock shaft 27 and to a pair of links 30 which are in turn pivotally connected at 31 to the outer legs 23 of the U-members 23.

Links 32 are provided, each of which has one end pivotally connected to one of the members 23, at 31, and its other end is supported by a shaft or pin 33. The members 23 and the valve 16, which is carried thereby, are thus supported, at opposite sides of their center of gravity, by the links 32, counterweights 22, and the rollers 25. The tracks 26 are of such curvature that they co-operate with the links 32 to maintain the valve 16 in substantially horizontal position when moving from one position to another.

By reference to Figs. 1 and 4 it will be seen that when the upper end of the lever 27 is actuated by the pull chains 28, the valve 16 will be caused to travel from the position indicated in full lines to that indicated in dotted lines, or vice-versa. The position of the valve determines which of the furnace flues 11 and 12 shall have communication, through the hood 17, with the stack 01 chimney flue 13.

When the flue 12 is covered by the valve 16 the gas valve 10 is opened and the gas valve 9 closed, so that gas will flow through the inlet 8, the furnace, (not shown) furnace flue 11, hood 17 and the gas flue 13, in the direction indicated by the arrows. When it is desired to reverse the flow of gases through the furnace, the gas valve 10 is closed; the valve 16 shifted to the furnace flue 12, and the gas valve 9 is opened so that the flow through the furnace to the stack flue 13 will be in substantially the direction reverse'to that shown bythe arrows.

From the foregoing it will be seen that I' gases,

I laim a my e i n= 1. Furnace valyestructure con 'iprising a valve chamber, pair of 'furnacefiues'comi' tinst h rew th, a SW fl e mmuni c'atin'g therewith, and a valve movable to close either of'the' furnace fines, "thestack flue being located between the furnace fines.

2. Furnacevalvestructure comprising a valve chamber, a pair of furnace fines commowin h r with, a; valve, or cl in either of the furnacefins, aga inlet conimunicating withjbne of' the furnace fines,

and a. gas inlet communicating with the other furnace flue.

3. Furnace valve structure comprising a valve. chamber, a h od m mbe herefo form ng the upp r portion, thereof, a p offurnace fines communicating with said chamber at a point below said hood, a stack flue disposed between said furnace fiues, and avalveinovable to close either of the furnace flues.

4. Furnace valve structure comprising a valve chamber, a hood member" the'i'iefor forming'the upper portion thereof, ap'air of" furnace fines" communicating with said chamber, a stack flue communicating with said chamber'a't a point'bel'owsai'd hood, a valve for closing either of said furnace flu'es,

a'gas inlet communicating with one'o-f the furnace fines, and a gas inlet communicating with the other furnace flue. i

In testimony whereof, I, the said NICHOLAS F. EGnE have here'i' nto set 'my'hand; 5

NICHOLAS F. EGLER. 

